Dump-wagon.



W. L. COLLINS.

DUMP WAGON.

APPLICATION FILED MAE. 6. 1911.

Patented June 11 1912.

2 SHEETSSHEET 1.

c numau PLANOGHAI'H CO-.WASH|NGTON. n. C.

Patented June 11, 1912.

2 SHBETSSHEET 2.

30 57 O W 2 .3 O l o 23? g z 4 4 5 OE 5 4 7 ll 3 T g X I} 1 UNITE STATES FATENT ()FFTC WILBUR L. COLLINS, OF NEWARK, NEW YORK, ASSIGNOR TO DANIEL 'W. CROVJLEY, OF NENARK, NEW YORK.

DUMP-WAGON.

Application filed March 6, 1911.

Specification of Letters Patent.

Patented June 11, 1912.

Serial No. 612,503.

To all, whom it may concern:

Be it known that I, VVILBUR L. COLLINS, of Newark, in the county of Wayne, in the State of New York, have invented new and useful Improvements in Dump-Wagons, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in dump wagons in which the box is provided with opposite pairs of laterally swinging bottom doors meeting substantially midway between the sides and longitudinal center of the box and refers more particularly to the door operating and controlling mechanism.

The main object is to provide simple means for quickly and tightly closing the doors from their full open position by a single operation as distinguished from the repeated operations of a ratchet and pawl action in the operation of a drum.

Another object is to reduce the number of parts necessary in the operation of opening and closing the doors and holding them in their closed position.

A still further object is to provide simple means for releasing the doors from their closed position to permit the discharge of the load.

Another object is to connect both ends of the doors to the same door operating lever by means of self-adjusting flexible connections whereby both ends of both doors may be tightly closed in the same operation even though one door may close first.

Other objects and uses will be brought out in the following description.

In the draWings FigureS 1 and 2 are respectively a top plan and a side elevation of a dump box embodying the various features of my invention. Figs. 3 and 4 are front and rear end views respectively of the same dump box and door controlling mechanism. Fig. 5 is a transverse sectional view through the box taken on line 55, Fig. 2. Figs. 6 and 7 are similar horizontal sectional views through the front end of one side of the box showing more particularly the door holding and releasing mechanism, said mechanism being in position for holding the doors closed in Fig. 6 and for releasing the doors in Fig. 7. Figs. 8 and 9 are enlarged detail sectional views of portions of the same mechanism taken respectively on lines 8-8 and 9 9 Fig. 6. Figs. 10 and 11 are en larged detail sectional views taken respectively on lines 10-10 and 1111 Fig. 2 showing more particularly the Sheaves at the rear and front ends of the box around which the cables are passed for connection with the opposite ends of the doors. Fig. 12 is an enlarged horizontal sectional view through the end lever and adjacent portions of the links which are connected to the cables taken on line 1212 Fig. 2.

The dump box preferably comprises opposite side walls -1 and 2, front and rear end walls 3 and -land lengthwise bottom doors 5- and -6 arranged in pairs or sets at opposite sides of the longitudinal center of the box all of which parts may be made of wood, sheet metal or any other suitable material. The bottom of the box is provided with a central lengthwise bar 7 extending from end to end and preferably secured at its ends to the ends of the box by strap bolts -8-, said bar being preferably in the form of an inverted V so as to devide and deflect the load more or less equally to opposite sides thereof during the operation of discharging the same. The inner doors of each set or pair are hinged to the central bar 7 so as to swing downwardly and inwardly when released while the outer doors of each set or pair are hinged to the sides of the box in such mannor as to swing downwardly and outwardly as shown by dotted lines in Figs. 3 and 4. One of the objects in providing opposite pairs of doors is to reduce the length of the arcs through which they swing and thereby reduce the amount of movement of the cables and operating lever so that the doors may be closed from their full open position by a single movement of said lever in one direction and through acomparatively short stroke or are. These doors preferably abut against the lower edges of the sides and ends of the box and when closed tit closely against the opposite edges of the central bar 7- so as to avoid leakage.

Pivoted to one side, usually the right hand side 2 of the box near the front end thereof is an upright hand lever 9 having its intermediate portion provided with a fixed pawl l0 for engagement with a toothed rack -ll presently do scribed to hold the doors in their closed position. Pivotally connected to the upper end of this lever above the pawl 10 and preferably by the same pivot are links 12-- and -13 the link 12 being comparatively short and is attached to one end of separate cables 14 and l5 which are passed laterally through an opening 16-- in the adjacent side of the box just in front of the front end 3 and around a sheave -17 journaled in said opening, said cables being passed around sheaves 18* on the front end of the box and are provided with fall-blocks 19 around which are passed suitable cables '20 having their ends connected to the front ends of the meeting edges of the doors. The sheaves l8 and their corresponding fall-blocks 19 are preferably located directly over the meeting edges of their respective pairs of doors so as to travel as nearly vertical as possible in the operation of opening and closing the doors and at the same time exerting a direct vertical lift in closing the doors and holding them in their closed position. In like manner the link 13- which is comparatively long and extends rearwardly along the outside of the adjacent side of the box in suitable guides 21 has its rear end attached to a pair of cables -22 and -23 corresponding to the cables 1l and 15. These cables 22 and -23 are also passed laterally through an opening 24- in the adjacent side of the box just at the rear of the rear end wall and around a sheave -25 which is journaled in said opening, said cables extending laterally partially across the rear end wall --4 and around sheaves 26 and are provided with fall-blocks 27 similar to the fall-blocks -19- for receiving and supporting cables 28 having their ends attached to the rear ends of the meeting edges of the doors. The sheaves -26 and fall-blocks 27 are also located directly over the meeting edges of their respective pairs of doors so as to allow the fall-blocks to travel as nearly vertical as possible in the operation of opening and closing the doors and to exert a direct upward lift in the operation of closing the doors and holding them in their closed positions.

The lengths of the portions of the chains or cables 1 land 15- and -22- and -23 between the links -12 and 13- and corresponding sheaves l7 and -25 are somewhat greater than the length of the arcs through which the meeting ends of the doors pass from their closed to their full open positions, thereby permitting a free action of said doors without liability of being stopped by contact of the ends of the links with the sheaves.

It will be observed that the hand lever 9- is fulcrumed at its lower end some distance below the rack -11 and extends upwardly some distance above the upper edge of the box where it is easily accessible for operation and that the links 12 and -13- are connected to the lever some distance above the toothed rack 11 where the are of movement is sufficiently long to permit the doors to be closed from their full open positions by a single forward movement of the lever. The doors are held in their closed position by engagementof the pawl -10- with one of the teeth of the rack -11, said lever being held against lateral displacement from the toothed rack -1l by means of a guide bar 3O-- which is secured in a horizontal position to the adjacent side of the box in close proximity to the pawl 10.

Door releasing mec/taaisvw-The toothed rack l1 is disposed in a horizontal position in a lengthwise slot in the adjacent side of the box and extends forwardly and rearwardly some distance beyond the arc of movement of the lever *9- with its teeth facing outwardly in the path of movement of the pawl -10- so as to engage and hold said pawl against backward movement in any position of adjustment. This rack -11 is pivoted at its front end in front of the lever to a fixed bracket 31 on the adjacent side of the box so as to allow the re maining portions of the rack to rock horizontally into and out of the path of movement of the pawl -lO so that by moving the rack inwardly it will disengage its teeth from the pawl and allow the doors to open, during which operation the lever *9 will be drawn backwardly to its starting posi tion for closing the doors.

The rack 11 is yieldingly held in operative engagement with the pawl -10 by a spring 32- as best seen in Figs. 1, G and 7 and is adapted to be withdrawn from engagement with said pawl against the action of the spring *32 by means of a foot le ver 38* and cam -34 which is connected to the lever 33* by a link The cam 34- pivoted intermediate its ends at -36 to the rear end of the toothed rack -11- as best seen in Figs. 6 and 7 and is provided with an eccentric cam face which bears against the inner side of a fixed metal plate -38- on the adjacent side of the box so as to rock the toothed rack -11- inwardly against the action of the spring pivoted at 39 to a fixed bracket on the inner face of the adjacent side of the box while the link -35- is pivoted at -40 to the intermediate portion of the lever and is also pivoted at its rear end at 3G to the cam lever --3't The pivots 36', 39 and 4-0 are relatively disposed in such manner that when the foot lever is rocked forwardly to its position for releasing the doors. the pivot ttl is in nearly a direct line extended through the pivots 3G- and ibt for locking the foot lever in its releasing position to prevent any possibility of engagement between the teeth of the rack -11 and pawl -40 during the operation of opening the doors or discharging the lead.

It will be seen from the foregoing descrip' tion that the cam lever -34- is mounted directly upon and movable with the toothed rack 1 l-- and together with the foot lever il l and link STP- constitutes a partieularl v simple means for releasing the door holding means. It will also be observed that the m ans for closing the doors consisting of the lever *-9. links -12 and l 3 and cables connected thereto are particularly simple and effective in permitting the doors to be closed in a single forward movement of the lever -9--. both ends of the doors being closed tightly.

The cables -20-- and -28 which are connected directly to the front and rear ends of the doors are free to render over the sheaves of the fall-blocks -l9- and 2T'. thereby assuring the positive closing of the doors of each pair even though one of the doors of either pair should close slightly in advance of the companion door.

Tn operation assuming that the doors are closed and that it is desired to dump the load. it is simply necessary for the operator to push the lever -'33 forwardly to its locked position which may be done either by the foot or by hand. by which operation the rack ll is withdrawn from engagement with the pawl -l(l-. thereby allowing the doors to open and causing the hand lever il to be drawn rcarwardly. .\fter the load has been discharged. the foot lever 43 is returned to its normal position and there vieldingly held by the spring 532 so that as the hand lever 9" is moved forwardly in the operation of closing the doors. the pawl 10 rides along and engages one of the teeth of the rack -11-- to effectively hold the doors in such closed iosition.

What I claim is:

1. In a dump wagon. a dump box having opposite pairs of laterally swinging bottom doors. a lever fulcrumed on the box. flexib e connections between the lever and front end" of the doors. separate flexible connections between the lever and rear ends of the doors. a pawl on the lever, a toothed rack pivoted l l l l l l at one end to the box, and means for moving the toothed rack into and out of engagement with the pawl comprising a cam lever pivoted to the opposite end of the rack, a foot lever. and connections between the foot lever and cam lever.

2. In a dump wagon. a dump box having bottom doors. a door-controlling mechanism comprising a hand lever pivoted to one side of the box and movable lengthwise thereof, a pawl rigid on the lever, a toothed rack pivoted at one end to the same side of the box and movable transversely of the direction of movement of the lever to force its teeth into and out of the path of said pawl. a rock arm pivoted to the opposite end of the rack and provided with a cam. a fixed bearing for the cam on the adjacent side of the box, a foot lever and connections between said foot lever and rock arm for rocking the cam against said bearing to force the rack out of engagement with the pawl. and connections between the first-named lever and doors.

3. In a dump wagon, a dump box having laterally swinging bottom doors, a hand lever pivoted to the front end of one side of the box and movable lengthwise thereof. a pawl on the lever, a toothed rack pivoted at one end to the smile side of the box and extending rearwardly from said pivot, a rock arm pivoted to the rear end of said rack and provided with a cam, a bearing for the cam. a foot lever. connections between the foot lever and rock arm for operating said cam to force the rack out of engagement with the pawl, a spring for forcing the rack into engagement with the pawl, and connections between the first-named lever and doors.

'1. In a dump wagon. a dump box having bottom doors. door-controlling mechanism connirising a hand lever pivoted to one side of the box and movable lengthwise thereof. connections between said lever and the doors. a pawl rigid on the lever. a horizontallydisposed toothed rack pivoted at one end within a slot, in the same side of the box and movable transversely of the direction of movement of the lever to force its teeth into and out of the path of said pawl. a rock arm pivoted to the opposite end of the rack and provided with a cam, a fixed bearing for the cam on the adjacent side of the box at the other end of the slot, a foot lever and connections between said foot lever and rock arm for rocking the cam against said bearing to force the rack out of engagement with the pawl. and a spring bearing against the rack to return same to normal position when the foot lever is released.

5. In a dump wagon. a dump box having laterally swinging bottom doors. a hand lever pivoted to the front end of one side of the box and movable lengthwise thereof,

connections between said lever and the doors, cam to force the rack out of engagement 10 a pawl on the lever, a toothed rack pivoted with the pawl, and a spring for forcing the at one end Within a slot in the same side of rack into engagement with the pawl.

the box and extending rearwardly from said In witness whereof I have hereunto set pivot, a rock arm plvoted t0 the rear end my hand on this 11th day of February 1911. of said rack and provided with a cam, a lVILBUR L. COLLINS. bearing for the cam at the rear end of said Witnesses:

slot, a foot lever, connections between the H. E. CHASE,

foot lever and rock arm for operating said E. F. SPEAKING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

